Zinc Oxide Film Transducers

Foster, N. F.; Rozgonyi, G. A.

doi:10.1063/1.1754565

Cited by 58 publications

(8 citation statements)

References 4 publications

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“…[4] As a semiconductor which exhibits significant photoconductivity, [5] ZnO is interesting for electronic applications as well. Its use has been explored in gas sensors, [6] varistors, [7] piezoelectric devices such as electroacoustic transducers, [8] and highly transparent conducting windows for solar cells and displays. [9] It absorbs destructive ultraviolet rays better than most other minerals.…”

Section: Introductionmentioning

confidence: 99%

Site‐Selective Deposition of Nanostructured ZnO Thin Films from Solutions Containing Polyvinylpyrrolidone

Lipowsky

Hoffmann

Welzel

et al. 2007

Adv Funct Materials

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When soluble zinc salts are hydrolyzed in water, usually elongated micrometer‐sized zincite crystals are formed. In this study, polyvinylpyrrolidone (PVP) in a methanolic solution is used as an agent to control the morphology of the deposition product. It prevents crystal growth and yields zinc oxide nanocrystals. Thin films consisting of zinc oxide nanocrystals are formed on self‐assembled monolayers (SAMs) of sulfonate‐terminated alkylsiloxanes. Patterned films are deposited after local decomposition of the SAM by UV irradiation. The films fabricated from methanolic solutions containing PVP are particularly smooth, uniform and stable. Their thickness is determined by the deposition time and the molar ratio [PVP]:[Zn2+], so that films of arbitrary thickness and nearly constant roughness can be obtained. The crystal grains are oriented preferentially with 〈001〉 direction perpendicular to the substrate surface. The films show ultraviolet, orange‐red and green‐yellow photoluminescence; the latter is quenched by heat treatment. Based on the obtained experimental results, a deposition mechanism is suggested.

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Section: Introductionmentioning

confidence: 99%

Site‐Selective Deposition of Nanostructured ZnO Thin Films from Solutions Containing Polyvinylpyrrolidone

Lipowsky

Hoffmann

Welzel

et al. 2007

Adv Funct Materials

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show abstract

“…As an important II−VI semiconductor, ZnO possesses unique optical, acoustic, and electronic properties, thus being of immense research interest . In recent years, ZnO nanostructures have become one family of the most extensively studied nanomaterials due to their potential applications in field emission, nanolasers, waveguides, nanosensors, ultraviolet detectors, optical switches, and so on .…”

mentioning

confidence: 99%

Straight and Thin ZnO Nanorods: Hectogram-Scale Synthesis at Low Temperature and Cathodoluminescence

Zhang

Yang

et al. 2005

J. Phys. Chem. B

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A novel seed-assisted chemical reaction at 95 degrees C has been employed to synthesize uniform, straight, thin, and single-crystalline ZnO nanorods on a hectogram scale. The molar ratio of ZnO seed and zinc source plays a critical role in the preparation of thin ZnO nanorods. At a low molar ratio of ZnO seed and zinc source, javelin-like ZnO nanorods consisting of thin ZnO nanorods with a diameter of 100 nm and thick ZnO nanorods with a diameter of 200 nm have been obtained. In contrast, straight ZnO nanorods with a diameter of about 20 nm have been prepared. Dispersants such as poly(vinyl alcohol) act spatial obstructors to control the length of ZnO nanorods. The morphology, structure, and optical property of the ZnO nanostructures prepared under different conditions have been characterized by transmission electron microscopy, field emission scanning electron microscopy, X-ray powder diffraction, high-resolution transmission electron microscopy, and cathodoluminescence. The formation mechanisms for the synthesized nanostructures with different morphologies have been phenomenologically presented.

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“…Although the quoted transduction efficiency of thin-film piezoelectric transducers has been steadily improving [I 1, [2], it is still difficult to assess the relative merits of the several device approaches reported. Transduction efficiency is usually measured when the transducer is tuned to electrical resonance by an external electromagnetic circuit.…”

Section: Referencementioning

confidence: 99%

Microwave measurement of thin-film transducer coupling constant

Reeder¹

1967

Proc. IEEE

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Zinc Oxide Film Transducers

Cited by 58 publications

References 4 publications

Site‐Selective Deposition of Nanostructured ZnO Thin Films from Solutions Containing Polyvinylpyrrolidone

Site‐Selective Deposition of Nanostructured ZnO Thin Films from Solutions Containing Polyvinylpyrrolidone

Straight and Thin ZnO Nanorods: Hectogram-Scale Synthesis at Low Temperature and Cathodoluminescence

Microwave measurement of thin-film transducer coupling constant

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